Most tap water starts as rain or snowmelt. It runs over land, sinks into aquifers, or collects in reservoirs before a utility treats it and pipes it to you. Every step adds a chapter to its story.
Go deeper
Background research
Surface water and groundwater
Utilities draw from rivers and lakes (surface water) or wells (groundwater). Each picks up different minerals and compounds from its surroundings. Your local utility publishes an annual Consumer Confidence Report describing its source and test results.
Glen’s perspective
Glen's perspective
Glen encourages people to start simply: find out where your own water comes from. It's the first question that leads to all the others.